稀土硅化物合金中PH_3气体的逸出行为

Evolution of PH_3 gas from rare earth silicide alloy

通过水化实验 ,对稀土硅化物合金中逸出的PH3 气体进行了定性与定量分析。采用S30 0型扫描电子显微镜 ,分析了含P稀土硅化物合金的微观结构及P元素的分布特点 ,研究了稀土硅化物合金中PH3 气体的逸出现象与P元素存在形态的关系。结果表明 :合金中只有少量的P以气体形式放出 ,大部分的P仍稳定地存在于水化后的合金中 ;合金中PH3 气体的放出与合金中的RESi2

To determine the evolution of PH 3 gas from the rare earth(RE) silicide alloy, the qualitative and quantitative analyses of PH 3 were done by water reaction experiment. With S300 SEM, the microstructure of P contented in RE silicide alloy and the distribution character of P element in alloy were studied, and the relationship between PH 3 gas evolution phenomenon and the existential state of P element in the alloy were discussed further. The results demonstrate that only a little P is released as gas, most of P exists steadily in the alloy after immersed in water, and the evolution of PH 3 gas is closely related with the RESi 2 phases in the alloy. [